13942539428842 has 4 divisors (see below), whose sum is σ = 20913809143266. Its totient is φ = 6971269714420.

The previous prime is 13942539428819. The next prime is 13942539428869. The reversal of 13942539428842 is 24882493524931.

It is a Cunningham number, because it is equal to 3733971²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13942539428841 + 1 = 3733971^2 + 1^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3485634857209 + ... + 3485634857212.

Almost surely, 2^{13942539428842} is an apocalyptic number.

13942539428842 is a deficient number, since it is larger than the sum of its proper divisors (6971269714424).

13942539428842 is an equidigital number, since it uses as much as digits as its factorization.

13942539428842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6971269714423.

The product of its digits is 119439360, while the sum is 64.

The spelling of 13942539428842 in words is "thirteen trillion, nine hundred forty-two billion, five hundred thirty-nine million, four hundred twenty-eight thousand, eight hundred forty-two".